test: add region test

3 files changed, 117 insertions, 0 deletions

diff --git a/test/app.cpp b/test/app.cpp
index 5e343bdc..0cacfe45 100644
--- a/test/app.cpp
+++ b/test/app.cpp
@@ -54,6 +54,7 @@ int test_app::exec()
         FM_TEST(test_raycast),
         FM_TEST(test_json),
         FM_TEST(test_loader),
+        FM_TEST(test_region),
         FM_TEST(test_wall_atlas),
         FM_TEST(test_json2),
         FM_TEST(test_wall_atlas2),
diff --git a/test/app.hpp b/test/app.hpp
index 7c736a95..e4b77614 100644
--- a/test/app.hpp
+++ b/test/app.hpp
@@ -38,6 +38,7 @@ struct test_app final : private FM_APPLICATION
     static void test_magnum_math();
     static void test_math();
     static void test_raycast();
+    static void test_region();
     static void test_saves();
     static void test_serializer1();
     static void test_tile_iter();
diff --git a/test/region.cpp b/test/region.cpp
new file mode 100644
index 00000000..9b09cdf9
--- /dev/null
+++ b/test/region.cpp
@@ -0,0 +1,115 @@
+#include "app.hpp"
+#include "src/world.hpp"
+#include "src/chunk-region.hpp"
+#include "loader/loader.hpp"
+
+namespace floormat {
+
+namespace {
+
+chunk& make_chunk1(chunk& c, bool val, bool flipped)
+{
+    auto floor = tile_image_proto { loader.ground_atlas("texel"), 0 };
+    auto empty = tile_image_proto{};
+
+    constexpr uint8_t mat[TILE_MAX_DIM][TILE_MAX_DIM] = {
+        { 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
+        { 0, 1, 1, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 0, },
+        { 0, 1, 1, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 0, },
+        { 0, 1, 1, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 0, },
+        { 0, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, },
+        { 0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, },
+        { 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, },
+        { 0, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 0, },
+        { 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 0, },
+        { 0, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, },
+        { 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 0, },
+        { 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 0, },
+        { 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, },
+        { 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 0, },
+        { 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, },
+        { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
+    };
+
+    if (!flipped)
+        for (auto j = 0u; j < TILE_MAX_DIM; j++)
+            for (auto i = 0u; i < TILE_MAX_DIM; i++)
+                c[{i, j}].ground() = !!mat[i][j] == val ? floor : empty;
+    else
+        for (auto j = 0u; j < TILE_MAX_DIM; j++)
+            for (auto i = 0u; i < TILE_MAX_DIM; i++)
+                c[{i, j}].ground() = !!mat[j][i] == val ? floor : empty;
+
+    return c;
+}
+
+constexpr auto COORD = chunk_coords_{2, 1, 0};
+
+void test1()
+{
+    auto w = world();
+    auto& c = make_chunk1(w[COORD], true, false);
+    auto p = chunk::pass_region{};
+    c.make_pass_region(p);
+    const auto count = p.bits.count();
+    fm_assert(count > 1000);
+    fm_assert(p.bits.size() - count > 2000);
+    fm_assert(c.get_pass_region()->bits == p.bits);
+    { auto w = world();
+      auto& c = make_chunk1(w[COORD], true, true);
+      auto p2 = chunk::pass_region{};
+      c.make_pass_region(p2);
+      fm_assert(p2.bits.count() == count);
+    }
+}
+
+void test2()
+{
+    auto w = world();
+    auto& c = make_chunk1(w[COORD], false, false);
+    auto p = chunk::pass_region{};
+    c.make_pass_region(p);
+    const auto count = p.bits.count();
+    fm_assert(count > 1000);
+    fm_assert(p.bits.size() - count > 2000);
+    { auto w = world();
+      auto& c = make_chunk1(w[COORD], false, true);
+      auto p2 = chunk::pass_region{};
+      c.make_pass_region(p2);
+      fm_assert(p2.bits.count() == count);
+    }
+}
+
+void test3()
+{
+    auto w = world();
+    auto& c = make_chunk1(w[COORD], true, false);
+    const auto bits = c.get_pass_region()->bits;
+    fm_assert(bits.count() > 1000);
+
+    { auto p2 = chunk::pass_region{};
+      c.make_pass_region(p2);
+      fm_assert(p2.bits == bits);
+    }
+
+    { const auto empty = tile_image_proto{};
+      fm_assert(c[{0, 0}].ground() != empty);
+
+      c[{0, 0}].ground() = empty;
+      fm_assert(c.get_pass_region()->bits == bits);
+
+      c.mark_passability_modified();
+      fm_assert(c.get_pass_region()->bits != bits);
+    }
+}
+
+} // namespace
+
+void test_app::test_region()
+{
+    test1();
+    test2();
+    test3();
+}
+
+} // namespace floormat